GE进口模块IC693MDL350

GE进口模块IC693MDL350

直流伺服电动机的基本结构与普通他励直流电动机一样，所不同的是直流伺服电动机的电枢电流很小，换向并不困难，因此都不用装换向磁极，并且转子做得细长，气隙较小，磁路不饱和，电枢电阻较大。电磁式直流伺服电动机的工作原理和他励式直流电动机同，因此电磁式直流伺服电动机有两种控制转速方式：电枢控制和磁场控制。对永磁式直流伺服电动机来说，当然只有电枢控制调速一种方式。

由于磁场控制调速方式的性能不如电枢控制调速方式，故直流伺服电动机一般都采用电枢控制调速。直流伺服电动机转轴的转向随控制电压的极性改变而改变。

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